Fix a bug causing all ALTER TABLE RENAME COLUMN commands to fail if ANALYZE
had been run on the database. Also prevent the user from renaming the columns
of system tables.
check-in: ca644a28 user: dan tags: alter-table-rename-column

Reload the entire schema after renaming a column in order to ensure that the
schema for any tables for which parent key definitions were changed are
reloaded.
check-in: f4497b01 user: dan tags: alter-table-rename-column